block, bfq: save & resume weight on a queue merge/split

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bfq saves the state of a queue each time a merge occurs, to be
able to resume such a state when the queue is associated again
with its original process, on a split.

Unfortunately bfq does not save & restore also the weight of the
queue. If the weight is not correctly resumed when the queue is
recycled, then the weight of the recycled queue could differ
from the weight of the original queue.

This commit adds the missing save & resume of the weight.

Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Francesco Pollicino <fra.fra.800@gmail.com>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

...

This commit is contained in:

Francesco Pollicino 2019-03-12 09:59:34 +01:00 • committed by Jens Axboe

parent 1e66413c4f

commit fffca087d5

2 changed files with 11 additions and 0 deletions

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2

block/bfq-iosched.c

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9

block/bfq-iosched.h

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